Juice key limes until you have a ½ cup of lime juice, add in 2 tablespoons of lime zest, and mix that with 7 ounces of sweetened condensed milk (about half a can), ¾ cup of water, and 1.5 tablespoons (or more) of tequila. Add a pinch of salt to the bottom of 2-ounce popsicle molds and pour the mix inside and freeze for six hours. Enjoy.